TUNE YOUR LOOP: Questions to keep you sharp.

Tune Your Loop is a series of posts consisting of questions from ISA Training Courses.

1. Standard analog instrument pneumatic signals are:

[ordered_list style=”lower-alpha”]
  1. 1 to 5 psig (6.9 to 34.5 kPa gage).
  2. 4 to 20 psig (27.6 to 137.9 kPa gage).
  3. 3 to 15 psig (20.7 to 103.4 kPa gage).
  4. 0 to 20 psig (0 to 137.9 kPa gage).
  5. 6 – 30 psig[/ordered_list]

2. From ANSI/ISA-5.1-1984, “Instrument Symbols and Identification:” The line
symbol ———- denotes a:

[ordered_list style=”lower-alpha”]
  1. Digital Signal
  2. Mechanical link
  3. Electrical signal
  4. Pneumatic signal
  5. Hydraulic signal[/ordered_list]

3. A ____________ control system evolved from central computer control of the
1960s and was developed initially for continuous flow processes that required
loop, analog, and limited discrete control.

[ordered_list style=”lower-alpha”]
  1. DDC
  2. Supervisory
  3. PLC
  4. DCS
  5. FF[/ordered_list]

4. A ________ is a microcomputer-based control device that was originally designed
to replace relay logic in the automotive industry.

[ordered_list style=”lower-alpha”]
  1. DDC
  2. PC
  3. DCS
  4. PLC
  5. FF[/ordered_list]

 

What are your answers before you read ahead?

1. c

2. c

3. d

4. d

 

From the ISA Course Troubleshooting Instrumentation and Control Systems (TC10) pre-instructional survey.

 

 

Pin It on Pinterest

Shares